Title :
OSNR monitoring technique based on orthogonal delayed-homodyne method
Author :
Youn, C.J. ; Park, K.J. ; Lee, J.H. ; Chung, Y.C.
Author_Institution :
Dept. of Electr. Eng., Korea Adv. Inst. of Sci. & Technol., Taejon, South Korea
Abstract :
The authors propose and demonstrate a simple technique to monitor the optical signal-to-noise ratio (OSNR) of wavelength-division-multiplexing (WDM) signals using the orthogonal delayed-homodyne method. This technique estimates the OSNR by analyzing the receiver noise characteristics after eliminating the signal components at a specific frequency within the modulation bandwidth. The results show that the OSNR of WDM signals could be monitored with accuracy better than 0.5 dB in the range of 12/spl sim/35 dB.
Keywords :
homodyne detection; noise measurement; optical fibre networks; optical noise; optical receivers; optical signal detection; wavelength division multiplexing; OSNR monitoring technique; WDM networks; WDM signals; accuracy; modulation bandwidth; optical signal-to-noise ratio; orthogonal delayed-homodyne method; receiver noise characteristics; signal components; specific frequency; wavelength-division-multiplexing; Frequency estimation; Frequency modulation; Monitoring; Optical modulation; Optical noise; Optical receivers; Propagation delay; Signal analysis; Signal to noise ratio; Wavelength division multiplexing;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2002.802377
